#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int main() {
	int i = 5, sum=0, a = 1;
	while (i > 0)
	{
		sum = (a + 1) * 5;
		a = sum;
		i--;
	}
	printf("%d", sum);
	return 0;
}